Actually, this dates back about a decade.
Remember, at one time WYOO (101.1 FM) and WTLG (1430 AM) were business partners...you know, a good-ole simulcast. When WYOO was sold to Styles Broadcasting,(1996) the rights to Rush reverted to WTLG...what was then Hour Group Broadcasting. There was some sort of battle for Rush, but WLTG won in the end. He's been stuck on the AM dial in PC ever since.
It's not a matter of Magic writing a check. It's a matter of WLTG having the rights. There was a slight ratings downturn when Rush went AM only in PC, but WYOO recovered nicely. Rush needs the FM in PC worse than it needs him.
As for why WLTG's signal is so bad...it's only licensed for 5k watts. And its position on the dial doesn't lend itself to an overpowering signal. If I'm not mistaken the only place where WLTG shows up in the book is during Rush.
The only way you'll ever hear Rush on the FM dial in PC is if the owners of WLTG go belly up, or if Clear Channel ever flips one of its FM signals to talk. CC owns the distribution rights to Rush. All it takes is a simple 90 day notice to WLTG. But I don't think CC starting an FM talker in PC will ever happen.